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Finding the Fourth Proportional to 118,805.30, 178,152.15 and 68,899.58

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Solution

The fourth proportional to 118,805.30, 178,152.15 and 68,899.58 is: 103,317.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,805.30 : 178,152.15 = 68,899.58 : x
  2. Step 2: Convert to fraction form
    118,805.30/178,152.15 = 68,899.58/x
  3. Step 3: Cross multiply
    118,805.30x = 178,152.15 × 68,899.58
  4. Step 4: Simplify right side
    118,805.30x = 12,274,608,311.10
  5. Step 5: Solve for x
    x = 12,274,608,311.10/118,805.30
  6. Step 6: Final answer
    x = 103,317.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.